SMILES : n(c(c(nc1)CC)C)c1
CHEM : Pyrazine, 2-ethyl-3-methyl-
CAS NUM: 015707-23-0
MOL FOR: C7 H10 N2
MOL WT : 122.17
------------------------------ EPI SUMMARY (v3.20) --------------------------
Physical Property Inputs:
Water Solubility (mg/L): ------
Vapor Pressure (mm Hg) : ------
Henry LC (atm-m3/mole) : ------
Log Kow (octanol-water): ------
Boiling Point (deg C) : ------
Melting Point (deg C) : ------
Log Octanol-Water Partition Coef (SRC):
Log Kow (KOWWIN v1.67 estimate) = 1.53
Log Kow (Exper. database match) = 1.07
Exper. Ref: Yamagami,C et al. (1991)
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
Boiling Pt (deg C): 189.48 (Adapted Stein & Brown method)
Melting Pt (deg C): 17.11 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 0.608 (Mean VP of Antoine & Grain methods)
BP (exp database): 57 @ 10 mm Hg deg C
Water Solubility Estimate from Log Kow (WSKOW v1.41):
Water Solubility at 25 deg C (mg/L): 1.202e+004
log Kow used: 1.07 (expkow database)
no-melting pt equation used
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 21405 mg/L
ECOSAR Class Program (ECOSAR v0.99h):
Class(es) found:
Neutral Organics
Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
Bond Method : 4.72E-006 atm-m3/mole
Group Method: 1.99E-008 atm-m3/mole
Henrys LC [VP/WSol estimate using EPI values]: 8.131E-006 atm-m3/mole
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: 1.07 (exp database)
Log Kaw used: -3.715 (HenryWin est)
Log Koa (KOAWIN v1.10 estimate): 4.785
Log Koa (experimental database): None
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.7987
Biowin2 (Non-Linear Model) : 0.9189
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 2.7795 (weeks )
Biowin4 (Primary Survey Model) : 3.5344 (days-weeks )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.3513
Biowin6 (MITI Non-Linear Model): 0.3638
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): 0.0721
Ready Biodegradability Prediction: NO
Hydrocarbon Biodegradation (BioHCwin v1.01):
Structure incompatible with current estimation method!
Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
Vapor pressure (liquid/subcooled): 73.7 Pa (0.553 mm Hg)
Log Koa (Koawin est ): 4.785
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 4.07E-008
Octanol/air (Koa) model: 1.5E-008
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 1.47E-006
Mackay model : 3.25E-006
Octanol/air (Koa) model: 1.2E-006
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 1.9688 E-12 cm3/molecule-sec
Half-Life = 5.433 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 65.193 Hrs
Ozone Reaction:
No Ozone Reaction Estimation
Fraction sorbed to airborne particulates (phi): 2.36E-006 (Junge,Mackay)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Soil Adsorption Coefficient (PCKOCWIN v1.66):
Koc : 92.8
Log Koc: 1.968
Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v1.67]:
Rate constants can NOT be estimated for this structure!
Bioaccumulation Estimates from Log Kow (BCFWIN v2.17):
Log BCF from regression-based method = 0.124 (BCF = 1.33)
log Kow used: 1.07 (expkow database)
Volatilization from Water:
Henry LC: 4.72E-006 atm-m3/mole (estimated by Bond SAR Method)
Half-Life from Model River: 208.9 hours (8.704 days)
Half-Life from Model Lake : 1601 hours (66.69 days)
Removal In Wastewater Treatment:
Total removal: 2.16 percent
Total biodegradation: 0.09 percent
Total sludge adsorption: 1.80 percent
Total to Air: 0.27 percent
(using 10000 hr Bio P,A,S)
Level III Fugacity Model:
Mass Amount Half-Life Emissions
(percent) (hr) (kg/hr)
Air 6.01 130 1000
Water 41.3 360 1000
Soil 52.6 720 1000
Sediment 0.0839 3.24e+003 0
Persistence Time: 380 hr